To estimate **FFO / Net debt** under an S&P-style approach:

1. **Funds from operations (FFO)** can be approximated from cash flow data as:
   - Cash flow from operations before working-capital changes is **EUR 616.36m**
   - Less income taxes paid: **EUR 91.854m**
   - This gives an operating cash flow proxy before working capital after tax of **EUR 524.506m**
   - Add back interest paid, because S&P FFO is generally before interest paid: **EUR 29.146m**

   Estimated FFO:
   \[
   524.506 + 29.146 = 553.652 \text{ million EUR}
   \]

2. **Net debt** is estimated from financial liabilities less cash and readily available financial assets.

   Financial debt/liabilities at year-end 2022:
   - Other noncurrent financial liabilities: **EUR 1,751.255m**
   - Noncurrent lease liabilities: **EUR 150.955m**
   - Other current financial liabilities: **EUR 389.716m**
   - Current lease liabilities: **EUR 6.362m**
   - Current financial liabilities at fair value through profit or loss: **EUR 76.644m**

   Gross debt:
   \[
   1,751.255 + 150.955 + 389.716 + 6.362 + 76.644 = 2,374.932 \text{ million EUR}
   \]

   Cash and financial assets deducted:
   - Cash and cash equivalents: **EUR 392.811m**
   - Other current financial assets: **EUR 211.136m**
   - Current financial assets at fair value through profit or loss: **EUR 141.568m**

   Total deductions:
   \[
   392.811 + 211.136 + 141.568 = 745.515 \text{ million EUR}
   \]

   Estimated net debt:
   \[
   2,374.932 - 745.515 = 1,629.417 \text{ million EUR}
   \]

3. **FFO / Net debt**:
   \[
   \frac{553.652}{1,629.417} = 0.3398
   \]

   So the estimated ratio is approximately **34.0%**.

<answer>0.340</answer>